>> ifill: nelson mandela's death was formally announced late today by south africa's current president jacob zuma. he expressed the country's love and sense of loss for their iconic leader, often referred to, out of respect, by his clan name, madiba. >> our beloved mandela, thefounr democratic nation, has departed. he passed on peacefully, in the company of his family, around 2050, on the 5th of december, 2013. he is now resting. he is now at peace.